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If it needs to look absolutely stock, then it really doesn"t matter whether you run a flat head or shave down a styled. The reason being is that by taking a tape measure and measuring the head thickness, one can quickly tell if enough has been planed off of the head to make a difference. Sure you probably won"t notice 10 or 15 thou. taken off to true up the head, but at the same time it won"t make a real noticeable difference in compression or performance either. Take off 100 thou. or better on the other hand, it will wake the tractor up, but can be easily noticed by a tape too. Besides, most places won"t balk too much about a styled G running a regular unstyled G flat head, as it is a Deere part, for a G, etc. Now a Jerrys/Murphys head, that may get into a bit grayer area.
Besides, if you really want to mandate lower or similar to stock compression ratios, just empty everyones fuel tanks and pour in some regular unleaded (87 octane)--Anyone running significantly higher compression will quickly stand out since they"ll be detonating something fierce. As to the original question, 110psi isn"t bad, but isn"t exactly lots either. With that number, I would guess that you"re either running stock pistons, or an older set of oversize pistons that don"t have much/any dome on them compared to the modern oversize pistons that are designed for burning today"s gas and raise the compression ratio to around 6 or 7 to one with the cyclone head, even higher with a flat head.
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